The one on the left is a bootleg, you can find them for cheap on eBay if you don't mind having a ridiculous-looking fake XP

The one on the right (clipping figure) seems to be tricky to find now, but there are two other official Galvantula figures that I know of. They're sort of chibi style rubber/soft plastic ones though (kid figure) and I don't particularly care for that style so I didn't collect those.

As for Joltik merch, there is a Joltik kid figure, and this keychain plush (which you can currently get at Sunyshore Mart gogogo!!! [link] )